539940 (2017 HW1)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4585305393 ± 1.85e-08
Semi-major axis (a)2.1379494101 AU ± 2.27e-08
Inclination (i)33.93429844° ± 5.61e-06
Long. of Asc. Node (Ω)41.31082257° ± 2.15e-06
Arg. of Perihelion (ω)168.80631156° ± 8.78e-06
Mean Anomaly (M)282.85413711° ± 1.06e-05
Mean Motion (n)0.3152943146°/day ± 5.02e-09
Perihelion dist (q)1.15763431 AU ± 4.14e-08
Aphelion dist (Q)3.11826451 AU ± 5.16e-08
Orbital Period3.12605156 yr ± 4.97e-08
Physical Parameters
H (abs. magnitude)18.00
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.518″
Uncertainty0
Orbit TypeAmor
MOID0.155744 AU
Observations Used1400
Oppositions9
Arc Total2012-2025
First Observation Used2012-10-22
Last Observation Used2025-12-13
Observations (2295)
Date Type RA Dec Mag Band Observatory
2020-04-12 14:44:18 s 1 -199824.16 6 +249233.28 1870.0 C57
2020-04-12 15:14:18 S 15 18 31.270 +46 47 05.42 V C57
2020-04-12 15:14:18 s 1 -200267.62 3 +247615.88 5530.0 C57
2020-04-12 15:44:18 S 15 18 25.253 +46 46 01.99 V C57
2020-04-12 15:44:18 s 1 -200703.08 7 +245988.63 2890.0 C57
2020-04-12 16:14:18 S 15 18 19.483 +46 45 05.04 V C57
2020-04-12 16:14:18 s 1 -201130.46 8 +244351.50 3840.0 C57
2020-04-12 16:44:18 S 15 18 13.459 +46 44 04.67 V C57
2020-04-12 16:44:18 s 1 -201549.67 3 +242704.48 8300.0 C57
2020-04-12 18:06:06 C 15 15 28.101 +46 43 26.05 V O85
2020-04-12 18:07:15 C 15 15 27.893 +46 43 23.80 V O85
2020-04-12 18:11:06 C 15 15 27.166 +46 43 14.79 V O85
2020-04-12 18:16:06 C 15 15 26.111 +46 43 03.99 V O85
2020-04-12 18:21:06 C 15 15 25.103 +46 42 53.45 V O85
2020-04-12 18:26:06 C 15 15 24.161 +46 42 41.87 V O85
2020-04-12 18:30:20 C 15 15 23.312 +46 42 32.72 V O85
2020-04-12 18:44:18 S 15 17 49.435 +46 40 02.57 V C57
2020-04-12 18:44:18 s 1 -203142.82 3 +236016.84 9450.0 C57
2020-04-12 19:00:50 C 15 15 19.53 +46 41 01.8 q 557
2020-04-12 19:14:18 S 15 17 43.675 +46 39 02.95 V C57
2020-04-12 19:14:18 s 1 -203519.70 3 +234319.91 100.0 C57
2020-04-12 19:44:18 S 15 17 37.282 +46 38 00.06 V C57
2020-04-12 19:44:18 s 1 -203887.81 8 +232612.92 3700.0 C57
2020-04-12 20:14:18 S 15 17 31.574 +46 37 01.92 V C57
2020-04-12 20:14:18 s 1 -204247.06 5 +230895.83 160.0 C57
2020-04-12 20:24:11 C 15 15 03.69 +46 38 01.1 q 557
2020-04-12 20:44:18 S 15 17 25.824 +46 35 57.08 V C57
2020-04-12 20:44:18 s 1 -204597.33 7 +229168.63 9370.0 C57
2020-04-12 21:14:18 S 15 17 19.517 +46 34 59.09 V C57
2020-04-12 21:14:18 s 1 -204938.52 8 +227431.27 1240.0 C57
2020-04-12 21:33:38 C 15 14 50.25 +46 35 29.3 q 557
2020-04-12 21:44:18 S 15 17 13.214 +46 33 56.27 V C57
2020-04-12 21:44:18 s 1 -205270.52 8 +225683.75 5660.0 C57
2020-04-12 22:14:18 S 15 17 07.534 +46 32 56.54 V C57
2020-04-12 22:14:18 s 1 -205593.22 6 +223926.01 2520.0 C57
2020-04-12 22:44:18 S 15 17 01.243 +46 31 57.65 V C57
2020-04-12 22:44:18 s 1 -205906.50 9 +222158.05 1720.0 C57
2020-04-12 22:44:21 C 15 14 36.42 +46 32 53.1 q 557
2020-04-12 23:14:18 S 15 16 55.279 +46 30 56.30 V C57
2020-04-12 23:14:18 s 1 -206210.26 2 +220379.83 3140.0 C57
2020-04-12 23:44:18 S 15 16 49.188 +46 29 53.27 V C57
2020-04-12 23:44:18 s 1 -206504.36 8 +218591.32 6680.0 C57
2020-04-12 23:55:59 C 15 14 22.22 +46 30 12.4 q 557
2020-04-13 00:14:18 S 15 16 43.231 +46 28 52.25 V C57
2020-04-13 00:14:18 s 1 -206788.70 8 +216792.50 2230.0 C57
2020-04-13 00:44:18 S 15 16 37.068 +46 27 52.16 V C57
2020-04-13 00:44:18 s 1 -207063.16 1 +214983.32 9660.0 C57
2020-04-13 00:54:40 C 15 14 10.57 +46 27 59.7 q 557
2020-04-13 01:14:18 S 15 16 30.797 +46 26 47.51 V C57
2020-04-13 01:14:18 s 1 -207327.60 3 +213163.78 8870.0 C57